Through careful ligature experiments on fish, snakes, and other animals, Harvey showed that these little doors opened and shut in such a way that blood could only flow one way through the veins, from ...

William Harvey publishes "An Anatomical Study of the Motion of the Heart and of the Blood in Animals," which details for the first time the idea of circulation and how blood travels throughout the ...

A few individuals, such as Andreas Vesalius, Ambroise Paré and William Harvey, made particularly ... working of the cardiovascular system (the heart and blood vessels). This led him to reject ...